Variable in CSS?

Question

I just read the variable css3 tutorial in w3schools.com, I wanted to use the variable function because it will make the code easier for me, but it didn't work in sololearn. Help?

Answer 1

you sure it it didnt work ?
try change --prm-clr here and see if the result change
https://code.sololearn.com/Wk3F4MM8XPXk/?ref=app